METHOD FOR ATTENUATING LOW FREQUENCY NOISE IN A DUAL-SENSOR SEISMIC STREAMER

摘要

A calculated vertical velocity sensor signal is determined from a recordedpressure sensor signal (11). A constructedvertical velocity sensor signal is determined as a linear combination of thecalculated vertical velocity sensor signal and arecorded vertical velocity sensor signal in dual-sensor seismic streamer data,using a mixture coefficient as a proportionality constant(12). An upgoing pressure wavefield component is determined as one half of adifference of the recorded pressure sensor signaland the constructed vertical velocity sensor signal, as a function of themixture coefficient (13). An error in the upgoing pressurewavefield component is determined by propagating errors in the recordedpressure sensor signal and constructed vertical velocitysensor signal terms (14). A value of the mixture coefficient is determinedthat minimizes the error in the upgoing pressurewavefield component (15).